www.yttm.tv.
You can use this site to view youtube videos by year.

www.tubechop.com
If you find a youtube video that you only want to use a portion of, this is the site for you.

www.scribblemaps.com
You can write on google maps using this site.

www.readability.com
This site allows you to strip out the distractions for a reading on line.

www.wallwisher.com
Virtual post-it notes.

http://howbigreally.com/
Compare geographically things you know with events.